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    <title>Profile Arcing</title>
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        <h1 align="center">Profile Arcing</h1>
		<p>Some enzyme formulations have been found to generate profiles with 
		extensive arcing. Such profiles do not conform well to the LRE model and 
		can thus generate unreliable quantifications. This is a profile 
		generated with CAL1 and 100 fg of lambda gDNA using ABI's AmpTaq Gold 
		enzyme formulation, which is known to produced extensive profile arcing:</p>
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		<b>An example of extreme profile arcing</b><br>
		<img border="0" src="images/amplitaq_arcing.gif" width="357" height="315"></p>
		<p align="left">Enzyme formations that have been found to be effective 
		for LRE analysis include Qiagen QuantiTect, Agilent Brilliant II, and 
		Invitrogen Platinum SYBR, although many other formulations are also likely to be 
		effective.</p>
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